Port Mirroring - D-Link xStack Reference Manual

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xStack DGS-3200 Series Layer 2 Managed Gigabit Ethernet Switch Web UI Reference Guide
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Port Mirroring

The Switch allows you to copy frames transmitted and received on a port and redirect the copies to another port. You can attach a
monitoring device to the mirrored port, such as a sniffer or an RMON probe, to view details about the packets passing through the
first port. This is useful for network monitoring and troubleshooting purposes.
To view the following window, click L2 Features > Port Mirroring:
To configure a mirror port:
1. Use the radio button to change the Target Port Settings Status to Enabled.
2. Use the drop-down menu to select the Target Port to which frames will be copied, which receives the copies from the
source port
3. Select the Source Port Setting Direction, TX (Egress), Rx (Ingress), Both, or None.
4. Click Apply to let the changes take effect.
NOTE: You cannot mirror a fast port onto a slower port. For example, if you try to mirror the traffic
from a 100 Mbps port onto a 10 Mbps port, this can cause throughput problems. The port you are
copying frames from should always support an equal or lower speed than the port to which you
are sending the copies. Also, the target port for the mirroring cannot be a member of a trunk
group. Please note a target port and a source port cannot be the same port.
multicast packet that requires forwarding to a port in the specified VLAN.
•
Forward Unregistered Groups – This will instruct the Switch to forward a multicast
packet whose destination is an unregistered multicast group residing within the
range of ports specified above.
•
Filter Unregistered Groups – This will instruct the Switch to filter any multicast
packets whose destination is an unregistered multicast group residing within the
range of ports specified above.
Figure 3 - 59. Port Mirroring window
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